For graphic display applications, the best choice is typically a TFT Color LCD module, while COG dot-matrix graphic LCDs are suitable for simpler monochrome graphics. The differences are outlined below.

1. TFT Color LCD Modules (Highly Recommended)

TFT LCDs are the mainstream solution for modern graphic displays.

Key Features

· Full-color display with high resolution

· Wide viewing angles and vivid image quality

· Supports graphics, icons, curves, animations, images, and complex UI interfaces

Common Interfaces

SPI, RGB, MCU, MIPI, and more — compatible with:

· Microcontrollers (MCUs)

· ARM processors

· Industrial controllers

· Smart devices

Typical Applications

· Instrument UI panels

· Smart home systems

· Handheld devices

· Industrial touchscreens

· HMI interfaces requiring rich graphics or animations

Advantages

TFT LCDs can freely display:

· Graphics and drawings

· Dot-matrix images

· Color menus

· Dynamic animations

They are the ideal choice for applications requiring a modern graphical interface.

2. COG Dot-Matrix Graphic LCD Modules

COG graphic LCDs are better suited for simple monochrome graphic applications.

Key Features

· Monochrome or yellow-green display

· Moderate resolution

· Low power consumption

· Cost-effective solution

Display Capability

Suitable for:

· Lines and curves

· Chinese characters

· Simple icons and menus

Not suitable for:

· Color images

· High-definition graphics

· Complex UI designs

Typical Applications

· Entry-level industrial equipment

· Simple instrumentation

· Basic monochrome display systems

Advantages

A good option when low cost and low power consumption are more important than advanced graphics.

3. Segment LCD Modules (Not Suitable for Graphics)

Segment LCDs are designed only for fixed-content displays.

Limitations

· Can display only predefined numbers and symbols

· Cannot generate arbitrary graphics, images, or custom icons

· No support for graphic interfaces or animations

Typical Applications

· Calculators

· Basic meters

· Simple numerical displays

Segment LCDs should not be selected for any application requiring graphic display functionality.

Selection Summary

Final Recommendation

If your project needs any kind of graphical interface, a TFT LCD module is usually the best choice.

If you're after simple monochrome graphics that are cheap and won't eat up your battery, go for a COG dot-matrix graphic LCD.

Try not to use Segment LCDs for graphic display applications.